Subaru Impreza 2003 Service Manual page 1039

Align the alignment mark on timing belt with marks on sprockets in alphabetical order shown in the figure.
While aligning marks, position the timing belt properly.
CAUTION:
• Disengagement of more than three timing belt teeth may result in interference between the valve
and piston.
• Ensure the belt's rotating direction is correct.
(3)
RH-IN
RH-EX
(E)
(1) Arrow mark
(2) Timing belt
(3) 28 tooth length
4) Install the belt idlers.
Tightening torque:
39 N·m (4.0 kgf-m, 28.9 ft-lb)
NOTE:
Make sure that the marks on the timing belt and
sprockets are aligned.
5) After ensuring that the marks on the timing belt
and sprockets are aligned, remove the stopper pin
from tensioner adjuster.
TIMING BELT ASSEMBLY
(1)
(4)
(D)
(7)
(4) 54.5 tooth length
(5) 51 tooth length
(6) 28 tooth length
ME-00090
ME(H4DOTC)-65
(5)
(B)
(A)
(7) Install it in the end
MECHANICAL
(2)
(6)
LH-IN
LH-EX
(C)
ME-00089